#include "muduo/proto/dispatcher.h"
#include "muduo/proto/codec.h"
#include "muduo/base/Logging.h"
#include "muduo/base/Mutex.h"
#include "muduo/net/EventLoop.h"
#include "muduo/net/TcpClient.h"
#include "muduo/net/EventLoopThread.h"
#include "muduo/base/CountDownLatch.h"

#include "request.pb.h"
#include <iostream>

class Client
{
public:
    typedef std::shared_ptr<google::protobuf::Message> MessagePtr;
    typedef std::shared_ptr<lyw::TranslateResponse> TranslateResponsePtr;
    typedef std::shared_ptr<lyw::AddResponse> AddResponsePtr;
    Client(const std::string& sip, int sport)
    :_latch(1)
    ,_client(_loopthread.startLoop(), muduo::net::InetAddress(sip, sport), "Client")
    ,_dispatcher(std::bind(&Client::onUnknownMessage, this, std::placeholders::_1, 
        std::placeholders::_2, std::placeholders::_3))
    ,_codec(std::bind(&ProtobufDispatcher::onProtobufMessage, &_dispatcher, std::placeholders::_1, 
        std::placeholders::_2, std::placeholders::_3))
    {
        // 注册业务请求处理函数
        _dispatcher.registerMessageCallback<lyw::TranslateResponse>(std::bind(&Client::onTranslate, this, 
            std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

        _dispatcher.registerMessageCallback<lyw::AddResponse>(std::bind(&Client::onAdd, this, 
            std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));
        
        _client.setMessageCallback(std::bind(&ProtobufCodec::onMessage, &_codec, 
            std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

        _client.setConnectionCallback(std::bind(&Client::onConnection, this, std::placeholders::_1));
    }
    void connect()
    {
        _client.connect();
        _latch.wait();
    }
    // 请求发送
    void Translate(const std::string& msg)
    {
        lyw::TranslateRequest req;
        req.set_msg(msg);
        send(&req);
    }
    void Add(int num1, int num2)
    {
        lyw::AddRequest req;
        req.set_num1(num1);
        req.set_num2(num2);
        send(&req);
    }
private:
    void onTranslate(const muduo::net::TcpConnectionPtr& conn, const TranslateResponsePtr& message, muduo::Timestamp)
    {
        std::cout << "翻译结果：" << message->msg() << std::endl;
    }
    void onAdd(const muduo::net::TcpConnectionPtr& conn, const AddResponsePtr& message, muduo::Timestamp)
    {
        std::cout << "加法结果：" << message->result() << std::endl;
    } 
    void onConnection(const muduo::net::TcpConnectionPtr& conn)
    {
        if (conn->connected())
        {
            _latch.countDown();
            _conn = conn;
        }
        else
        {
            _conn.reset();
        }
    }
    void onUnknownMessage(const muduo::net::TcpConnectionPtr& conn, const MessagePtr& message, muduo::Timestamp)
    {
        LOG_INFO << "onUnknownMessage: " << message->GetTypeName();
        conn->shutdown();
    }
    bool send(const google::protobuf::Message* message)
    {
        if (_conn->connected())
        {
            _codec.send(_conn, *message);
            return true;
        }
        return false;
    }
private:
    muduo::CountDownLatch _latch; // 实现同步
    muduo::net::EventLoopThread _loopthread; // 异步循环处理
    muduo::net::TcpConnectionPtr _conn; // 客户端对应的连接
    muduo::net::TcpClient _client; // 客户端
    ProtobufDispatcher _dispatcher; // 请求分发器
    ProtobufCodec _codec; // 协议处理器
};

int main()
{
    Client client("127.0.0.1", 8080);
    client.connect();

    client.Translate("hello");
    client.Add(5, 20);

    sleep(1);

    return 0;
}